plat helminth a

pl. [Pref. plat-, and Gr. helmins (gen it. helminthos )=a worm.] Zool.: Flat-worms; a cla of Vermes, with a more or le flattened oval body, and no distinct Segmentation. Three orders: Cestoidea (Tape and Ribbon Worms), Trematoda (Flukes), both Parasitic; Turbellaria (Non-Parasitic). *plā-tic,*plā-tick, a. [Lat. platicus =general, compendious (7).] Astron.: Pertaining to, or in the position of a ray cast from one planet to another, not exactly, but within the orbit of its own light. ( Bailey .)